发明名称 |
Vehicle compass compensation |
摘要 |
A compass compensation system is provided for automatically and continuously calibrating an electronic compass for a vehicle, without requiring an initial manual calibration or preset of the vehicle magnetic signature. The system initially adjusts a two axis sensor of the compass in response to a sampling of at least one initial data point. The system further calibrates the compass by sampling data points that are substantially opposite to one another on a plot of a magnetic field and averaging an ordinate of the data points to determine a respective zero value for the Earth magnetic field. The system also identifies a change in magnetic signature and adjusts the sensor assembly.
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申请公布号 |
US6922902(B2) |
申请公布日期 |
2005.08.02 |
申请号 |
US20030352691 |
申请日期 |
2003.01.28 |
申请人 |
DONNELLY CORPORATION |
发明人 |
SCHIERBEEK KENNETH L.;HOEKSTRA ERIC J.;BLANK RODNEY K.;VEISEH MERDAD;DEVETTE GREGORY H.;SCHOFIELD KENNETH |
分类号 |
G01C17/38;(IPC1-7):G01C17/38 |
主分类号 |
G01C17/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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